Why Are the Brake Calipers of Good Cars Positioned at the Rear?

[Dias]

Most luxury cars adopt rear-positioned brakes. With front-positioned brakes, the force from the caliper is upward while the force from the brake disc is downward during braking. These opposing forces can easily cause the car to experience phenomena like nose-diving or understeer during braking. When the brake disc is at the rear, the front of the car moves downward during braking, and the caliper also exerts a downward force. These two forces in the same direction help balance the front of the car. The main difference between front and rear brake discs lies in braking efficiency, with front brake discs generally offering higher braking efficiency. During driving, when the brakes are applied, the car tends to "nose-dive" forward due to inertia. At this point, the front braking system needs to handle over 70% of the braking force, while the rear brakes only need to manage about 30%. This means the car's braking force primarily relies on the front wheels, making disc brakes, which offer better braking efficiency and faster heat dissipation, more suitable for front braking. The notion that calipers at the rear signify a good car is not universally applicable.